Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92ffcb5ef0a582543fe87211263c494ac48e7f605890c00907b966844c648223' 
  AND token = '3piLho1zb2azOlc5Jh5BTD5enMIr2r2ph+Uwc+Hs4T8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}